WSOL aims at obtaining the localization of objects only with the image-level labels, which has broad applications in video understanding [1]}, medical imaging [2]} and remote sensing imagery analysis [3]}. Most WSOL methods extract activated regions of feature maps, which is called Class Activation Map (CAM) [4]}. These CAM-based approaches have achieved promising results on WSOL. Considering the capability of coverage, we apply the simplest CAM approach to find the discriminative regions and exchange the regions to realize task expansion.
